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A combined device for converter flue gas treatment and methanol preparation and method of using the same

A technology for the preparation of converter flue gas and methanol, which is applied in the field of resource recycling science and engineering, can solve the problems of high raw material costs, and achieve the effects of short construction period, large processing capacity, waste heat recovery and increased electricity sales revenue

Active Publication Date: 2020-08-28
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, raw materials for the preparation of methanol and related chemical products are mainly synthesized by pressurized catalytic hydrogenation using relatively pure carbon monoxide and carbon dioxide.

Method used

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  • A combined device for converter flue gas treatment and methanol preparation and method of using the same
  • A combined device for converter flue gas treatment and methanol preparation and method of using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Converter flue gas (CO-30%, CO 2 -20%, N2 -50%) after being discharged from the converter 1, it is collected by the converter hood 2 above the converter 1, and the converter flue gas is cooled to 400°C through the vaporization cooling flue 3, and then the cooled converter flue gas is directly introduced into the Preliminary dust removal is carried out in the high-temperature cyclone separator 4, and the amount of dust in the converter flue gas is reduced from 100g / Nm 3 down to 10g / Nm 3 Finally, the converter flue gas is introduced from directly above the high-temperature cyclone separator 4 into the bag filter 5 for deep dust removal, further reducing the amount of dust to 25mg / Nm 3 , to obtain the pretreated flue gas. Then the flue gas is introduced to the flue gas component detector 6 connected to the bag filter 5 with a pipeline, and it is detected that the CO content in the flue gas is 30%, and the flue gas is sprayed into the carbonization reaction furnace 7 thro...

Embodiment 2

[0046] Converter flue gas (CO-30%, CO 2 -25%, N 2 -45%) after being discharged from the converter 1, it is collected by the converter hood 2 above the converter 1, the converter flue gas is cooled to 500°C through the vaporization cooling flue 3, and then the cooled converter flue gas is directly introduced into the Preliminary dust removal is carried out in the high-temperature cyclone separator 4, and the amount of dust in the converter flue gas is reduced from 80g / Nm 3 down to 7g / Nm 3 Finally, the converter flue gas is introduced from directly above the high-temperature cyclone separator 4 into the bag filter 5 for deep dust removal, further reducing the amount of dust to 20mg / Nm 3 , to obtain the pretreated flue gas. Then the flue gas is introduced to the flue gas component detector 6 connected to the bag filter 5 with a pipeline, and it is detected that the CO content in the flue gas is 25%, and the flue gas is sprayed into the carbonization reaction furnace 7 through ...

Embodiment 3

[0051] Converter flue gas (CO-30%, CO 2 -30%, N 2 -40%) after being discharged from the converter 1, it is collected by the converter hood 2 above the converter 1, the converter flue gas is cooled to 600°C through the vaporization cooling flue 3, and then the cooled converter flue gas is directly introduced into the Preliminary dust removal is carried out in the high-temperature cyclone separator 4, and the amount of dust in the converter flue gas is reduced from 30g / Nm 3 down to 5g / Nm 3 Finally, the converter flue gas is introduced from directly above the high-temperature cyclone separator 4 into the bag filter 5 for deep dust removal, further reducing the amount of dust to 15mg / Nm 3 , to obtain the pretreated flue gas. Then the flue gas is introduced to the flue gas component detector 6 connected to the bag filter 5 with a pipeline, and it is detected that the CO content in the flue gas is 25%, and the flue gas is sprayed into the carbonization reaction furnace 7 through ...

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Abstract

The invention belongs to the field of resource recycling science and engineering technology, and in particular relates to a combined device for converter flue gas treatment and methanol preparation and a method of use thereof. The device includes flue gas pretreatment equipment, crude methanol preparation equipment and methanol refining equipment; the flue gas pretreatment equipment includes a converter hood, a vaporization cooling flue and a valve with a flue gas component detector; the crude methanol preparation equipment includes a carbonization reaction Furnace and shell-and-tube low-pressure isothermal reaction synthesizer; the flue gas is released from the converter and collected by the converter hood. After being cooled by the vaporization cooling flue, it enters the valve with a flue gas component detector. When the flue gas with a flue gas component detector When the valve detects that the CO volume fraction in the flue gas is less than 40%, the valve directs the flue gas into the carbonization reactor and the shell-and-tube low-pressure isothermal reaction synthesizer to prepare crude methanol. The use of converter flue gas can greatly reduce the synthesis cost of methanol, and the composition is easy to adjust and the process is easy to control. It is an important exploration and practice for chemical synthesis and resource recycling in the steel industry.

Description

technical field [0001] The invention belongs to the field of resource recycling science and engineering technology, and in particular relates to a combined device for converter flue gas treatment and methanol production and its use method. Background technique [0002] About 70% of the total energy used in steel industry production will be converted into secondary energy (including by-product gas), but about 30% of the secondary energy has not been fully recovered. At present, the average gas recovery rate of most enterprises in my country is low, the consumption is large and the emission is serious, which is also one of the reasons for the high energy consumption per ton of steel in my country's iron and steel industry and the energy consumption of each key process. [0003] The resource utilization of the by-product gas in the steelmaking process is also one of the focuses of various iron and steel enterprises. At present, raw materials for the preparation of methanol and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/152C07C31/04B01D50/00C07C29/76
CPCY02P20/50
Inventor 薛向欣宋翰林张金鹏杨合程功金黄壮
Owner NORTHEASTERN UNIV LIAONING